616840218 has 64 divisors (see below), whose sum is σ = 1399345920. Its totient is φ = 201367296.

The previous prime is 616840193. The next prime is 616840247. The reversal of 616840218 is 812048616.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 657846 + ... + 658782.

It is an arithmetic number, because the mean of its divisors is an integer number (21864780).

Almost surely, 2^616840218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616840218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699672960).

616840218 is an abundant number, since it is smaller than the sum of its proper divisors (782505702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616840218 is a wasteful number, since it uses less digits than its factorization.

616840218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 616840218 is about 24836.2681979399. The cubic root of 616840218 is about 851.2508540813.

The spelling of 616840218 in words is "six hundred sixteen million, eight hundred forty thousand, two hundred eighteen".